Thermodynamic investigation and comparison of selected production processes for hydrogen and hydrogen-derived fuels

The results are reported of comparisons based on energy and exergy analyses of a wide range of production processes for hydrogen and hydrogen-derived fuels (HDFs). A commercial process-simulation computer code, previously enhanced by the author for exergy analysis, is used in the analyses. Depending on the process and the efficiency definition used, overall efficiencies are determined to range widely, from 21 to 92% for energy efficiencies and from 19 to 83% for exergy efficiencies. The losses for all processes are found to exhibit many common factors. Energy losses associated with emissions account for 100% of the total energy losses, while exergy losses associated with emissions account for 4 to 11% of the total exergy losses. The remaining exergy losses are associated with internal consumptions. It is anticipated that the results will prove useful to those involved in the improvement of existing and design of future production processes for hydrogen and HDFs.

[1]  M. S. Casper,et al.  Hydrogen manufacture by electrolysis, thermal decomposition, and unusual techniques , 1978 .

[2]  M. Rosen,et al.  Exergy analysis of hydrogen production from heat and water by electrolysis , 1992 .

[3]  F. J. Brykowski.  Ammonia and synthesis gas : recent and energy-saving processes , 1981 .

[4]  K. Hassmann,et al.  Primary energy sources for hydrogen production , 1993 .

[5]  M. A. Rosen,et al.  Energy and exergy analyses of a production process for methanol from natural gas , 1988 .

[6]  David Scott.  Hydrogen in the evolving energy system , 1993 .

[7]  Marc A. Rosen,et al.  Thermodynamic comparison of hydrogen production processes , 1996 .

[8]  James A. Kent,et al.  Riegel's handbook of industrial chemistry , 1933 .

[9]  Michael J. Moran,et al.  Availability analysis: A guide to efficient energy use , 1982 .

[10]  Robert A. Meyers,et al.  Handbook of synfuels technology , 1984 .

[11]  M. Rosen.  Energy and exergy analyses of electrolytic hydrogen production , 1995 .

[12]  M. A. Rosen,et al.  Thermodynamic investigation of hydrogen production by steam-methane reforming , 1991 .

[13]  Frano Barbir,et al.  Modeling of hydrogen penetration in the energy market , 1993 .

[14]  M. A. Rosen,et al.  An energy-exergy analysis of the Koppers-Totzek process for producing hydrogen from coal☆ , 1987 .

[15]  Marc A. Rosen,et al.  Comparative assessment of thermodynamic efficiencies and losses for natural gas-based production pro , 1996 .

[16]  F. Barbir,et al.  Hydrogen: the wonder fuel , 1992 .